package com.cool.collect.springcode.a02;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.context.annotation.AnnotationConfigUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author xiemiao
 * @description
 * @date 2023/08/24
 */
public class TestBeanFactory {
    public static void main(String[] args) {
        DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
        // bean的定义(class, scope, 初始化， 销毁)
        AbstractBeanDefinition beanDefinition = BeanDefinitionBuilder.genericBeanDefinition(Config.class).setScope("singleton").getBeanDefinition();

        beanFactory.registerBeanDefinition("config", beanDefinition);

        // 给beanFactory添加后置处理器
        AnnotationConfigUtils.registerAnnotationConfigProcessors(beanFactory);

        beanFactory.getBeansOfType(BeanFactoryPostProcessor.class).values().forEach(beanFactoryPostProcessor -> {
            beanFactoryPostProcessor.postProcessBeanFactory(beanFactory);
        });

        // Bean后处理器，针对bean的生命周期的各个阶段提供扩展，例如@Resource @Autowired...
        beanFactory.getBeansOfType(BeanPostProcessor.class).values().forEach(beanFactory::addBeanPostProcessor);

        for (String beanDefinitionName : beanFactory.getBeanDefinitionNames()) {
            System.out.println(beanDefinitionName);
        }

        // 准备好所有单例
        beanFactory.preInstantiateSingletons();
        System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
        System.out.println(beanFactory.getBean(Bean1.class).getBean2());

    }

    @Configuration
    static class Config {

        @Bean
        public Bean1 bean1() {
            return new Bean1();
        }

        @Bean
        public Bean2 bean2() {
            return new Bean2();
        }
    }

    static class Bean1 {
        private static final Logger log = LoggerFactory.getLogger(Bean1.class);

        public Bean1() {
            log.info("构造Bean1()");
        }

        @Autowired
        private Bean2 bean2;

        public Bean2 getBean2() {
            return bean2;
        }
    }

    static class Bean2 {
        private static final Logger log = LoggerFactory.getLogger(Bean2.class);

        public Bean2() {
            log.info("构造Bean2()");
        }

    }


}
